Paper-fastening for sander-cylinders



2 Sheets8heet 1.

(No Model.)

M A BECK PAPER FASTENING FOR SANDER CYLINDERS.

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No. 597,048. Patented Jan. 11, 1898.

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1n: warm mm co. mom-Limo" WASHINGVON n r UNITED STATES PATENT FFlEEMATTHIAS A. BECK, OF lllILlVAUKEE, VISCOFSIN, ASSIGNOR TO THE MILYVAUKEESANDER MANUFACTURING COMPANY, OF GREEN BAY, \VISGONSIN.

PAPER-FASTENING FOR SANDER-CYLINDERS.

SPECIFICATION forming part of Letters Patent No. 597,048, dated January11, 1898.

Application filed July 6, 1897. Serial No- 643,552. (No model.)

T0 all whom. it may concern:

Be it known that I, MA'rTHIAs A. BECK, of Milwaukee, in the county ofMilwaukee and State of \Visconsimhave invented certain new and useful.Improvements in Paper-Fastenings for Sander-Cylinders; and I do herebydeclare that the following is a full, clear, and exact description ofthe invention, which will enable others skilled in the art to which itpertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

The main object of my invention is to produce effective, reliable, andeasily-manipulated means for fastening the ends of sandpaper topolishing-cylinders.

It consists, essentially, of a grooved bar or abutment and a tonguedclam pin g-bar loosely fitted in a parallel groove or recess oppositesaid bar or abutment and provided at one end with a creasing-roller andalso of certain novel details hereinafter particularly described, andpointed out in the claims.

In the accompanying drawings like letters designate the same parts inthe several figures.

Figure l is a partial end elevation and partial vertical cross-sectionof a portion of a polishing drum or cylinder of a sanding-machine towhich my improved papenfastenings are applied, the fastenings being cuttransversely by the section in a plane indicated by the line 1 1, Fig.2. Fig. 2 is a plan view of the clamping-bar constituting a part of eachfastening, a portion. of the bar being broken away in order to show itin condensed space. Fig. 3 is a cross-section on the line 3 3, Fig. 2,showing the creasing-roller and its relation to the clamping-bar; andFig. l is an end view of a part of the cylinder or drum to which thepaper-fastenings are applied, the clamping-bars being removed.

For the purpose of illustration I have shown myimproved fastening inFigs. 1 and 4 as applied to a polishing drum or cylindeigwhich isprovided with an automatic device for taking up slack in the paper andpreventing folds or ridges therein when the machine is in operation; butI do not wish to be understood as limiting myself in the application ofthe fastening to this particular kind of a cylinder, as it is alsoapplicable to others, al-

though it is particularly suitable and advantageous for use inconnection with an automatic takeup of the general character shown inFig. 1.

Referring to Figs. 1 and 2, A designates a portion of a polishing drumor cylinder of a sandpapering or polishing machine. It is formed orprovided in one side of its periphery with a longitudinal slot a,through which the ends of the sandpaper, which is wrapped around thecylinder, are inserted. In a radhlly-disposed wall of the cylinder onone side of the opening ais formed a groove or recess a, opposite whichis a grooved abutment or bar B.

Referring to Fig. 2, G is a clamping-barfitted in said groove or recessa, as shown in Fig. l, and formed on one side or edge with a tongue 0,which corresponds in shape and position with the groove in the bar B,but is made somewhat smaller or narrower than said groove to allow forthe thickness of the paper to be pressed bysaid tongue into said groovewithout cutting or tearing the paper. In a recess formed in or near oneend of said clamping-bar is journaled or pivoted a creasing-roller D,the periphery of which is shaped to correspond with and preferablyprojects slightly in advance of the tongue 0.

E E are springs for forcing the clam ping-bar with a yielding pressuretoward the grooved bar or abutment B. These springs may be attached, asshown, to the clamping-bar or to the cylinder in the groove or recess inwhich the clamping-bar is inserted. The clamping bar may be madeslightly tapering, as shown in Fig. 2, to facilitate its insertion intoplace and to insure its holding the paper securely at the end oppositethe creasing-roller; but it may be made straight or of uniform widthwithout material effect upon its operation. At the opposite end from thecreasing-roller itis formed with a hole 0, in which a hook or otherinstrument for thrusting it into and withdrawing it from the cylindermay be inserted.

F designates the automatic take-up, which is formed with a groove orrecess a. and provided opposite said recess with a grooved bar orabutment B, like or similar to those here- IGO of the take-up and, withthe opposing bar or:

abutment B, constitutes the other or movable paper-fastening. Thegrooves or recesses a are openat oneor both'ends of the cylinder, asshown in Fig. i, to receive the clamping- .bars,which are .thrust'intothem or withdrawn therefrom endwise, the ends with the creasing-rollersD being inserted first. The cylin der is provided with means, such ascams, (indicated by the dotted lines inFigs. 1 and 4,)

,to force the take-up F against the tension of i springs G away from thefixed paper-fastening for the purpose of inserting and securingthe'otherend of the paper therein, one end of the paperbeing rfirstsecured in the fixed fastening.

My improved fastening operates as follows:

The edge of the paper is thrust through the,

slot a in the cylinder between the recess a and the grooved barB, andthe clamping-bar C is then thrust endwise into saidrecesswith thecreasing-roller D in advance. This roller forms a crease or groove inthe paper, pressing it into the groove in the opposing bar 13, and thetongue 0, following said creasingroller in the crease or groove formedthereby, securely binds the paper in the groove of said bar 13 from endto end. After securing one end of the paper in the fixed fastening it iswrapped around the cylinder and secured in like manner in the movablefastening applied to the take-up, which is held for the purpose awayfrom the fixed fastening, as shown in Fig. 1, by the cams hereinbeforementioned or other suitable means. When the paper is fastened iiierein,the take-up is released, as shown in Fig. 4, and pressed by the springsG toward the fixed fastening, thereby stretching the paper taut aroundthe periphery of the roller and automatically taking up slack in thepaper as it is produced by the operaation of the machine.

The fastenings heretofore employed in this class of machines in whichthe clamping-bars, moved longitudinally by screws, are forced byinclines laterally against opposing bars or abutments have been founduncertain and unsatisfactory in operation. lengthwise with great forceby the operatingscrews they will clamp the paper securely only for ashort portion of the length of the bar. My improved fasteningeffectually overcomes this difiiculty, and it requires only a moderateforce to thrust the clamping-bar with the creasing-roller into place.

By the term sandpaper, as used herein,

Even when drawn I intend to include its obvious equivalents, cloth orpaper having a surface provided with sand, emery, or other abradingmaterial.

I claim.-' I

1. In a fastening for securing sandpaper to a polishing-cylinder, thecombination with a grooved bar orabutment arranged lengthwise of thecylinder within its periphery, of a clamping-bar loosely fitted in agroove or recess opposite and parallel with'said grooved bar or abutmentand provided at one end with acreasing-roller, substantially as and forthe purposes set forth.

2. In a fastening for securing sandpaper to a polishing-cylinder, thecombination with a grooved bar orabutment, of a clamping-bar looselyfitted in a groove or recess in the cylinder' parallel with said groovedbar or abutment, and formed with a tongue adapted to enter the groove inthe opposing bar, a creasing-roller pivoted to said clamping-bar at ornear one end thereof and having its periphery shaped to correspond withsaid tongue beyond which it projects slightly, and means for yieldinglypressing said clamping-bar toward said grooved bar or abutment,substantially as and for the purposes set forth.

3. The combination with a polishing-cylinder having a longitudinal slotin its periphcry, a grooved baror abutment and a groove or recessadjacent to and parallel with said slot, of a clamping-bar fitted toslide freely endwise in said groove or recess and having one edge orside fitted to enter the groove in the opposing bar or abutment, acreasing roller pivoted to said clamping bar inarecess therein at ornear one end thereof, the periphery of said roller correspondingin shapeand position with the working side or edge of said clamping-bar, and oneor more springs arranged to press said clamping-bar toward the opposingbar or abutment, substantially as and for the purposes set forth.

4. The combination with a polishing-cylinder having a longitudinal slotin its periphery, and a yielding take-up device arranged adjacent to andparallel with said slot and movable transversely thereto, of fasteningdevices applied one to said take-up and the other to the cylinderopposite the take-up and each consisting of a grooved bar or abut ment,a clamping-bar provided at or near one end with a creasing-roller, theperiphery of which is adapted to traverse the groove in the opposing baror abutment when the clampingbar is thrust endwise into the cylinder,and one or more springs arranged to press the clamping-bar toward theopposing bar or abutment, substantially as and for the purposes setforth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

MATTHIAS A. BECK.

Witnesses:

OHAs. L. Goss, D. A. KELLEY.

